完整報錯如下:

Exception in thread "main" java.lang.NullPointerException: No execution.target specified in your configuration file.
?? ?at org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:75)
?? ?at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.executeAsync(StreamExecutionEnvironment.java:1721)
?? ?at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1634)
?? ?at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1620)
?? ?at org.apache.flink.streaming.api.environment.StreamExecutionEnvironment.execute(StreamExecutionEnvironment.java:1602)
?? ?at AnatomyofaFlinkProgram.main(AnatomyofaFlinkProgram.java:37)

?

原因:

不要使用new

?

解決方案:

StreamExecutionEnvironment senv=new StreamExecutionEnvironment();

?

改成:

StreamExecutionEnvironment senv = StreamExecutionEnvironment.getExecutionEnvironment();

?

總結

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